v.25.10Bug Fix (user-visible misbehavior in an official stable release)

Fix makes the setting to control attempts

Official CH changelog text
Big clusters with node numbers > 10 have a high probability of failing the restore with error [941] 67c45db4-4df4-4879-87c5-25b8d1e0d414 <Trace>: RestoreCoordinationOnCluster The version of node /clickhouse/backups/restore-7c551a77-bd76-404c-bad0-3213618ac58e/stage/num_hosts changed (attempt #9), will try again. The num_hosts node is overwritten by many hosts at the same time. The fix makes the setting to control attempts dynamic. Closes #87721. #88484 (Mikhail f. Shiryaev).
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